Heating apparatus



J. HARRINGTON.

HEATING APPARATUS. APPLICATION FILED NOV. 9,1916- RENEWED FEB. 24, 1922-1,418,871. e t n 6, 1922.

2 SHEETS-SHEET I- J. HARRINGTON.

v HEATING APPARATUS. APPLICATION FILED NOV- 9,1916- RENEWED FEB.24.1922- 1 ,&1 8,87 1 a Patented June 6, 1922.

2 SHEETS-SHEET 2.

JOSEPH HARRINGTON, 0F RIVERSIDE, ILLINOIS.

HEATING APPARATUS.

Application filed November 9, 1916, Serial No. 130,351. Renewed February24, 1922.

To all whom it may concern:

Be it known that I, JOSEPH HARRINGTON, a citizen of the United States,and resident of Riverside, county of Cook, and State of Illinois, haveinvented certain new and useful Improvements in Heating Apparatus, ofwhich the following is a specification, and which are illustrated in theaccompanying drawings, forming a part thereof.

The invention relates to the heating of buildings, more especially whena single furnace is employed for heating a number of rooms and provisionis made for con veying a heated fluid from the furnace to the variousrooms. The object of the invention is to secure greater economy in theoperation of the furnace, both by reducing the amount of attendancenecessary for replenishing the fuel and by confining the combustion offuel to that required for maintaining the desired temperature in theseveral rooms.

The invention accordingly contemplates the provision of a variable speedstoker for the furnace and the use of a thermostat for regulating boththe speed of the stoker and the amount of the air supplied forcombustion of the fuel, the thermostat being located remote from thefurnace and centrally with respect to the rooms to be heated.

Inthe accompanying drawings,

Fig. 1 is a detail sectional view illustrating a building with theimproved heating apparatus installed therein, some of the parts beingconventionally represented and other parts being shown in diagram;

.Fig. 2 is an elevation of the thermostat 'drawn'to a larger scale andwith the fron wall of the case removed;

Fig. 3 is a sectional view of the motor for actuating the stoker, theplane of the section being indicated by the line 3-3 on l ig. 4 is asectional view of the furnace, some of the parts being broken away andthe motor which actuates the stoker being shown intelevation, and

Fig. 5 is acentral sectional view of the said motor with some of'theparts shown in elevation.

For the purpose of illustrating one application of the invention thedrawings show a so-called hot water heating system. A plurality of therooms of a building are conventionally represented as 10, 11, 12, and13, with a radiator 14 in each of the said rooms. The furnace isgenerally designated Specification of Letters Patent.

Patented June 6, 1922.

Serial No. 539,039.

a plurality of chambered sections, as 19, in

a well known manner. As shown, the sections 19 are constructed toenclose a fire box 20 and/ash pit 21. The grate, as 22, is composed of aplurality of fixed sections, as 23-24, and movable sections, as ,25 and26. These grate sections are arranged in a descending series, formingsteps or led es, and the movable sections 25-26 are s idingly mountedfor reciprocation in their respective planes. The lowest grate section,as 24, is located some distance from the rear end wall, as 27, ofthefurnace, forming a throat or passage 28 through which the ash isdelivered over the end of the grate to the a continuous supply of fuel.As shown, this hopper is secured against the front wall of the furnaceand the sliding grate section 25 extends under the hopper. While anyconvenient form of mechanism may be employed for reciprocating thesliding grate sections 25 and 26, this mechanism should preferably bearranged to impart a slow movement to these grate sections with but asmall consumption of power. The arrangement shown includes a rock shaft34 which extends through the space 31, directly below the grate, fromside to side of the furnace and beyond the side wall, as 35, of thefurnace, at one end. Links 36 and 37 connect the grate sections 25 and26 with crank arms 38 and 39 of the rock shaft 34.

Power for oscillating the rock. shaft 34 is conveniently supplied from awater motor, generally designated 40, but this rock shaft may also beoscillated by hand when a considerable quantity of fuel is required tobe supplied at one time, as when starting the fire. The water motor 40is represented as comprising a cylinder 41 and piston 42. The outer endof the piston rod, as 43, is connected with a notched bracket 44'. Ahand lever 45 is applied to the projecting end of the rock shaft 34 andthis hand lever is removably connectedwith the piston rod 43, as througha pin 46 which is fixed in the hand lever 45 and enters the notch, as47, of the bracket 44. In order that the piston rod 43 may accommodateitself to the swinging movement of the hand lever 45 and to permit thebracket 44 being lifted out of engagement with the pin 46 when it isdesired to oscillate the rock shaft 34 by hand, the cylinder 41 isswingingly mounted. For this purpose it is pivotally secured against afixed support at one end, as at 48, (Fig. 4).

The construction contemplates the use of the domestic water supply foroperating the motor 40. The water supply pipe is accord ingly shown at49 and a discharge pipe is indicated at 50. Both of these pipes areconnected with a valve casing 51. Pipes.52 and 53 connect thevalvecasing 51 with the two ends of the cylinder 41. A valve 54 turns withinthe valve casing 51 and is movable between two positions for connectingthe pipes 52 and 53 with the supply and discharge pipes 49 and 50, inalternation. The mechanism for turning the valve 54 includes twoangularly separated crank arms 55 and 56, rigidly mounted upon therstemof the valve. A slotted arm 57 is also mounted upon the stem of. thevalve 54, but swings loosely thereon, as a pivot, and the valve 54 isturned between its two positions by the alternate engagement of the arm57 with the crank arms 55 and 56. The position of the valve 54 isundisturbed throughout the strokes of the piston 42 in each directionbut is quickly changed at the end of each stroke if the oscillations ofthe arm 57 are partly accomplished by the movements ofthe piston 42 andare completed by gravity. As shown, the bracket 44 is formed with anupright arm 58and a slotted link 59 is connected with the arm 58- at itsupper end.

bracket 85 which rises from the wall of the cylinder 41 serves forguiding the slotted link 59 and thislink is operatively connected withthe swinging arm 57 through a wrist pin 60 which slides in the slots ofboth of these members. This arrangement provides that the arm 57 israised during the strokes of the piston 42 in each direction and passesan upright position just as eachstroke of the piston is completed. Thearm 57 then falls by gravity and turns the valve 54 by engagement withthe crank arm 55 or 56.

The rate at which fuel is carried over the grate 22 is modified byvarying the speed of the motor 40. A throttle valve 61 accordingly isprovided in the water supply pipe 49. Mechanism for automaticallyadjusting this valve is conventionally represented as comprising a gearpinion 62, mounted on the stem of the valve, and a reciprocating gearrack 63 which meshes with the said pinion. The two ends of the gear rack63 are constructed to serve as the cores of two solenoids 64 and 65.When this arrangement is employed the gear rack 63 is moved in onedirection for opening the throttle valve 61, by energizing one of thesolenoids, as 64, while energizing the other solenoids, as 65, serves tomove the gear rack 63 in the opposite direction -for closing thethrottle valve 61.

The damper'29 is shown as being made in the form of a tilting plate. Thedamper is accordingly'opened by raising the plate, as by pulling upon achain 66. Similarly, releasing the chain 66 permits the closing of thedamper. A mechanism for automatically movin the damper is thereforeeasily. provided. uch a mechanism is convent-ionally represented ascomprising a drum 67 upon which the chain 66 is wound. A gear pinion 68is mounted upon the drum spindle and this pinion meshes with areciprocating gear rack 69. The gear rack 69 is constructed to be movedin opposite directions by solenoids 70 and 71 in the same manner as thegear rack 63. Movement of the gear rack 69 in one direction, as by theenergization of the solenoid 70, serves to wind the chain 66 upon thedrum 67 for opening the damper 29. On the other hand, the energizationof the solenoid 70 serves to rotate the drum67 for releasing the chain66 to permit the closing of the damper 29.

With the arrangement shown, an automatic regulation both of the rate atwhich fuel is delivered to the furnace and of the amount of air suppliedfor combustion, in accordance with variations in the temperature of therooms to be heated, is readily accomplished by the use of a thermostat,generally designated 72. Preferably the thermostat 72'is centrallylocated with respect to the rooms, as 10, 11, 12, and 13,- to be heated,as in a hallway 86. The thermostat 72 may comprise an arm, as 73, whichis flexed by changes of temperature in a well known manner, as by'beingformed from two unlike metal strips 7 47 5. One end of the arm 73 issecured to a fixed support, as at 76, and, to increase the amount ofmovement at its other end, the arm is made of considerable length andpart of the arm adjacent its fixed end is formed into a coil 77. Thefunction of the thermostat 72 is to close an electric circuit throughthe solenoids 64- and 7 0 when the temperature of the rooms, as 10, 11,12, and 13 is too low, and to close an electric circuit through thesoleformed with aninsulated damper 29 when the arm 3 noids 65 and 71when the temperature of the said rooms is too high. As shown, a commonlead 78 extends from the fixed end of the thermostat arm 73 to thesource of current, to which source all of the solenoids 64, 65, 70 and71 are connected. The thermostat 72 also comprises a pairof angular-1yseparated contacts 79-80. These contacts are located in the pathofmovement of the free end of the arm 73 and theyare preferably madeadjustable, for engagement by the said arm in different positions of thelatter. This ad justment may be accomplished 'in any convenient manner.For simplicity of illustration the thermostat 72 is shown as beingnotched quadrant 8,1 and the several notches of thequadrant areconstructed to interchangeably receive the contacts 79 and 80. A circuitwire 82 extends from the contact 79 to both of the solenoids 64 and 70.Similarly a circuit wire 83 extends from the contact 80 to both of thesolenoids 65 and 71. It follows that if a source of electric energy, asa battery 84, is located in the lead 78, the solenoids 64 and 70 will beenergized for increasing the speed of the motor and raising the of thethermoatat'72 comes into engagement with the contact 79. On the otherhand, the solenoids 65 and 71 will be energized, for reducing the s eedof .the motor and lowering the" amper 29, when the arm 73 of thethermostat 72 comes into engagement with the corresponding contact 80. Asuitable'adjustment of the contacts 79 and 80 upon the thermostat 72serves tomaintain the temperature of the roomst as 10,11, 12, and 13,between the desired limits. F urthermore' the combustion offuel in thefurnace 15 is, confined to that required for maintaining the desiredtemperature in the'several rooms and the furnace requires no. attendanceother than an occasional filling of the fuel hopper 33 and-removal ofashes from. the ash pit 21. It will, of course,

where it will not be subject to direct influence from any windows (notshown) or from any of the radiators 14. I claim as my invention,

. 1. In heat control apparatus, in combination, a thermostat havlng amoving part and low temperature and] high temperature ycon' tacts, amechanical stoker, control" means therefor comprising positivelyactingaccelerating' and positively acting retarding means, a draft.damper, control means there-- be understood that the thermostat 72should, :be located at a place contacts arranged in the path of saidarm,

a furnace, air supply means for said furnace, a mechanical stokerforsupplying solid .fuel to said furnace,'a pair of solenoids forcontrolling said air supply, a second pair of solenoids for controllingthe operation of said stoker, an electrical connection between said lowtemperature contact and one sole- 'noid of eachrpair, an electricalconnection between said high temperature contact and the other solenoidof each pair, and electrical connection between the thermostat arm andthe source of current and between each of the solenoids and the sourceof current.

- 3. The combination with a heating furnace for buildings of a variablespeed mechanical stoker and a movable draft damper for the furnace, athermostat located in a part of the building to be heated by the saidfurnace and having a movingrpart and. low temperature and hightemperature" contacts, a controlling device forthe furnace stokercomprising positively acting accelerating means and positively actingretarding means,

a controlling device for the furnace draft,

damper comprising positively acting means to' open the damper andpositively acting means effective to allow the dampertoclose,ielectrical connections between the said low temperature contactof the thermostat, the said accelerating, means of the stokercontrolling device and 'the s'aid opening means of the dampercontrolling device, electrical connections between the said hightemperature contactof the thermostat the said retarding means of thestoker controlling device and the said closing means .of thedampercontrolling device, and electrical connection between the saidmovingpart of the thermostat and a source of currentand betweenthesource of current and both of. the said parts of each of the saidcontrollin devices. 7

' J HAR I'NGTON.

